Im gonna throw some names at ya...let me know if any stick...

Frankie
Bert
Eugene
Butch
Julio
Mr. Rocky Balboa (all you SNL DogShow fans!)
Camel (the spitting kind)
Dom (short for Dominick)
Mike the Maniac (I named my cat like that)
Ricky "the snake" Sanchez (like a mob name or something)
Donnie "no fingers" McGee( haha get it)


best way is to think of the craziest crap you know...and roll with it.
I named my rats Lucy and Fat Ma. I found later lucy was one sassy girl and Lucifer would be a good name if she was a male. and Fat Ma is indeed a fat mother..she protects lucy and is on the cubbier end.

Also you can never go wrong with a Biblical name!